Abstract Stars OS Background by LiFaytheGoblin
This is a background which you can use for your own OS simulations.

Abstract Violet OS Background by LiFaytheGoblin
This is a Backgorund you can use for your own OS Simulation.

Abstract Nature OS Backgorund by LiFaytheGoblin
This is a background you can use for your own OS Simulations.

Chrysanthemum by moretzprogramming
sample picture from my computer

Petz 5 Host Tabby by PersainCatz
Can be used for petz fan gamez

SeaScape by humhumgames
A beach sea background. Feel free to use, no credit needed.

Peregrine Falcon by spyglass

Dew on a leaf by Rumble_King95
A picture of dew drops on a leaf.

Orca (Killer whale) by Rumble_King95
A great picture of two orcas jumping. Source of the file is http://commons.wikimedia.org/wiki/File:Killerwhales_jumping.jpg The website states that it is in the public domain

Andromeda Galaxy background from OSX Lion by jji7skyline
I found this in the desktop backgrounds folder of my Mac and resized it to 360x480 for use in my Mac OSX scratch project. Thought I might share it here so you guys can put it some good use :)